Altair Astro Customer Support
  • Home
  • Cameras
    • Where to buy
    • Image Gallery
  • Info & Instructions
  • Register
  • Login
Select Page

At what aperture do I use an ERF Energy Rejection Filter for solar imaging?

by Altair Support | Aug 18, 2020

ERFs are used for 2 main reasons. Improved image quality, by reducing heat buildup and hot air currents inside your telescope and by keeping your Hydrogen Alpha or Calcium filter at a stable constant temperature, it keeps it “on-band” – Etalons of...

Can filters be placed in front of a focal reducer flattener?

by Altair Support | Aug 18, 2020

While many focal reducers and flatteners are threaded to accept filters, or to connect to M48 accessories, generally, putting a filter in front of the reducer or flattener optics is not recommended for two reasons. Firstly, it tends to cause optical aberrations,...
  • Facebook
  • X
  • Instagram
  • RSS

Designed by Elegant Themes | Powered by WordPress

This website uses cookies
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Cookie settingsACCEPT
Privacy & Cookies Policy

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may have an effect on your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Non-necessary
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.
SAVE & ACCEPT
Loading...

Insert/edit link

Enter the destination URL

Or link to existing content

    No search term specified. Showing recent items. Search or use up and down arrow keys to select an item.